Game Development Reference
In-Depth Information
17 - Graphics and Animation
9. WINDOWHEIGHT = 400
10. windowSurface = pygame.display.set_mode((WINDOWWIDTH,
WINDOWHEIGHT), 0, 32)
11. pygame.display.set_caption('Animation')
12.
13. # set up direction variables
14. DOWNLEFT = 1
15. DOWNRIGHT = 3
16. UPLEFT = 7
17. UPRIGHT = 9
18.
19. MOVESPEED = 4
20.
21. # set up the colors
22. BLACK = (0, 0, 0)
23. RED = (255, 0, 0)
24. GREEN = (0, 255, 0)
25. BLUE = (0, 0, 255)
26.
27. # set up the block data structure
28. b1 = {'rect':pygame.Rect(300, 80, 50, 100), 'color':RED,
'dir':UPRIGHT}
29. b2 = {'rect':pygame.Rect(200, 200, 20, 20), 'color':GREEN,
'dir':UPLEFT}
30. b3 = {'rect':pygame.Rect(100, 150, 60, 60), 'color':BLUE,
'dir':DOWNLEFT}
31. blocks = [b1, b2, b3]
32.
33. # run the game loop
34. while True:
35. # check for the QUIT event
36. for event in pygame.event.get():
37. if event.type == QUIT:
38. pygame.quit()
39. sys.exit()
40.
41. # draw the black background onto the surface
42. windowSurface.fill(BLACK)
43.
44. for b in blocks:
45. # move the block data structure
46. if b['dir'] == DOWNLEFT:
47. b['rect'].left -= MOVESPEED
48. b['rect'].top += MOVESPEED
49. if b['dir'] == DOWNRIGHT:
50. b['rect'].left += MOVESPEED
51. b['rect'].top += MOVESPEED
52. if b['dir'] == UPLEFT:
53. b['rect'].left -= MOVESPEED
54. b['rect'].top -= MOVESPEED
55. if b['dir'] == UPRIGHT:
56. b['rect'].left += MOVESPEED
57. b['rect'].top -= MOVESPEED
58.
